Chimney-forming block



Aug. 11, 192s.

J. zwANEvELD CHIMNEY FORMING BLOCK IN1/Emmi; Sokzwcmeve l.,

I vllT Filed March 18 lll Patented Aug. ll, 1925.

UNITED ST CHIMNEY-FORMING BLOCK.

Application led March 18, 1924. Serial No. 700,031.

T0 all whom t may concern.'

.Be it known that l, JOHN ZwaNEvnLD, a subject of the Queen of Holland, resid ing at Ridgewood, in the county of Bergen and State `of NewJersey, have invented certain new and useful Improvements in Chimney-Forming Blocks, of which the following is a specification.

This invention consists in a novel construction of molded block for use in building chimneys or other flues. rPhe principal objects of the invention are to provide a block suitable for this purpose and thus eliminate a large part of the expense which is necessary when a chimney is built of brick; to construct the blocks so that they may be laid rapidly and yet with accuracy and so that the chimney will present a goed appearance; and to form the blocks so that with the use of hollow tiles or equivalent lining means cement can be introduced, preferably by pouring, to seal all joints and bond the constituent elements of the finished chimney firmly together.

ln the drawing,

Fig. l is a side elevation, partly in section, of a chimney built of the improved alocks;

Fig. 2 is a plan of one of the blocks; and

Fig. 3 is a side elevation thereof;

The block i is molded from some plastic material, as concrete, for which material thick enough to require tamping or pressure in the molding thereof would be used as is common in forming concrete blocks for building purposes. The block shown is square in plan to conform to the plan of the ordinary single-flue chimney.

Each block is preferably to be interlocked with the one above and below it and to rest squarely thereon without cement or other bonding substance between them where their joints are eXteriorly exposed, and for this purpose each has molded on one horizontal side thereof, as the top, an upstanding flange or projection t and in the other a rabbet o,

` each being formed around the vertical flueforming opening or passage through the block and being square in plan and having its sides parallel with the sides of the block, the dimensions in plan of the projection being such that when one block is laid on another with their sides flush the projection of the lower block will enter and preferably more or less fit the rabbet of the upper block, the surfaces d and e at the top and bottom of each block around the projection and rabbet, respectively, being horizontal or perpendicular to the sides of the block.

ln order to build a chimney quickly and with a saving of labor it is proposed to introduce hollow tiles or other tubular lining members as the building of the chimney progresses, and so as to seal and also bond the entire structure to introduce a plastic bonding substance between the lining thus provided and the superposed blocks; to obtain good sealing and bonding eects and also further facilitate the building of the chimney and reduce the cost thereof it is further proposed to use a plastic bonding substance, as cement, in a state which can be poured into place. l therefore form the vertical passage through each block as follows:

This passage is made to taper, as at g, from or near the top of the block downwardly. Thus as each block is placed in position with a lining member f introduced thereinto as shown, cement poured into the downwardly tapering space between them will completely fill said space, leaving no voids, especially if the taper as shown rep'- resents little departure from the vertical or a quite acute angle of convergence and has relatively considerable depth, which .is obtained by extending it down past a horizontal plane half-way between the top and bottoni of the block. If each taper g eX- tended clear to the rabbet o of the corresponding block there would be an acuteangular shoulder formed at the juncture with the (wider) upper end of the next taper below; wherefore l taper the passage, as at i., from the rabbet upwardly. This latter taper has its upper or least transverse dimension equal to that at the base of the taper g and its lower oi greatest transverse dimension equal to that of the rabbet, whereby the cement can readily flow outwardly to fill all voids in this part of the passage. l

Each block may as shown have exterior opposed recesses 'el cast therein to afford hand-holds.

A chimney is preferably built up as shown in Figure l as follows: The first block is placed on a suitable base and a hollow tile f set on the base within the passage of the block and then the cement is poured in, filling the space between the block and the hollow tile, until the cement is about flush :in ...u

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' Letters Patent is:

with the top of the block. Each block, which is approximately square in plan, the saine as the usual brick chimney, has a vertical dimension of about 5, and as the average hollow tile is 9A in length the latter will be left projecting above the block. Then another block is laid on the first block and cement is again poured in the space formed between the second block and the hollow tile. This operation is repeated, the hollow tiles being successively superposed on each other so as to forni a lining of the chimney as its outer portion is built up by superposing the blocks.

The use of cement capable oi being poured is not indispensable, though it willexpedite the worlr. ln fact, by bevelling the blocks away at 7L the mason is able if desired to use cement thiol: enough to be trowelled; that is, he can place cement with a trowel on the top oi the projection of one block and then place the next block in position, the bevel resulting in a squeezing-inward of the cement with all voids filled, and finally trowel* in to the remaining part of the space the cement required to fill it.

Then the chimney is completed, the lining and the series of supcrposed blocks are bonded together by the intervening hollow column of' cement, whose circumferentia-l projecting portions t' not only seal the interstices between the bloclis butlocl the column in fixed relation to the series ot blocks by being received in interior circumierential grooves in effect formed in the series of blocls, all outside seams being wit-hout Cement. f

' Having thus fully described my invention, what l claim as new and desire to secur'e by l.. A molded block having a vertical passage therethrough tapering downwardly at a given angle of convergence from approximately thetop of' the block to a lowerplane and being tapered upwardly to approxi mately said plane from a still lower plane and at an angle of convergence greater than the first angle.

2. A molded block having a vertical passage therethrough tapering downwardly at a given angle of convergence from approximately the top of the block to a lower plane and being tapered upwardly to approximately said plane from a still lower plane and at an angle of convervence greater than the first angle and said block having at top and bottom a projection around the passage and an opposite rabbet respectively adapted to form interlochs with the adjoining rabbet and projection on adjacent similar block when the several blocks are superposed on each other. i

3. A molded block having a vertical pasv sage therethrough and on the top a projec tion around the passage and in the bottoni a rabbet opposed to the projection, said passage being tapered downwardly at a given angle. of convergence from approximately the top of the project-ion through the major portion of the depth of the block and being tapered upwardly from the rabbet to the iirst taper at a greater angle of convergence.

4i. A flue-forming structure including a series of superposedblocks each having a vertical passage therethrough and the sev eral passages being alined, said series also having interior endless circumferential grooves arranged at different elevations, lining flue-forming members formed independently ot and arranged in said superposed blocks and superposed on each other, each oic the several lining members being spaced from the blocks all around, and a bonding substance filling said space and grooves and 'forming a hollow integral column from top to bottom of the structure.

5. A. flue-forming' structure including a series of superposed blocks cach having a vertical passage therethrough and the several passages being alined and each tapering dinvnwardly from approximately the top of' the block through the major portion of its depth, lining fiue-forming members arranged in said superposed blocks and superposed on each other and spaced from the blocks all around, and a bonding substance filling such space and forming a hollow integral column from top to bottom of the structure. Y

ln testimony whereof l affix my signature.

JOHN ZVANE VELD. 

